Patch "drm/mgag200: Reject non-character-cell-aligned mode widths" has been added to the 4.0-stable tree

Patch "drm/mgag200: Reject non-character-cell-aligned mode widths" has been added to the 4.0-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/mgag200: Reject non-character-cell-aligned mode widths

to the 4.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-mgag200-reject-non-character-cell-aligned-mode-widths.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 25161084b1c1b0c29948f6f77266a35f302196b7 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Mon, 15 Jun 2015 16:16:15 -0400
Subject: drm/mgag200: Reject non-character-cell-aligned mode widths

From: Adam Jackson <ajax@redhat.com>

commit 25161084b1c1b0c29948f6f77266a35f302196b7 upstream.

Turns out 1366x768 does not in fact work on this hardware.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/mgag200/mgag200_mode.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1526,6 +1526,11 @@ static int mga_vga_mode_valid(struct drm
 		return MODE_BANDWIDTH;
 	}
 
+	if ((mode->hdisplay % 8) != 0 || (mode->hsync_start % 8) != 0 ||
+	    (mode->hsync_end % 8) != 0 || (mode->htotal % 8) != 0) {
+		return MODE_H_ILLEGAL;
+	}
+
 	if (mode->crtc_hdisplay > 2048 || mode->crtc_hsync_start > 4096 ||
 	    mode->crtc_hsync_end > 4096 || mode->crtc_htotal > 4096 ||
 	    mode->crtc_vdisplay > 2048 || mode->crtc_vsync_start > 4096 ||


Patches currently in stable-queue which might be from ajax@redhat.com are

queue-4.0/drm-mgag200-reject-non-character-cell-aligned-mode-widths.patch
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